SIP协议

SIP协议

SIP协议主要包括 SIP头 SIP内容 和附加内容三个部分

项目	格式	备注	示例
SIP头	一行，以\r\n结尾		REGISTER sip:172.30.2.35 SIP/2.0\r\n
SIP内容	很多行，每行为Key，Value的形式		CSeq: 1 REGISTER\r\n
附加内容	很多行

1 SIP头

项目	格式	含义	示例
INVITE			INVITE sip:miyanhui_t1@172.30.11.79:11870;transport=tcp SIP/2.0
REGISTER			REGISTER sip:172.30.2.35 SIP/2.0\r\n
ACK			ACK sip:miyanhui_t1@172.30.11.79:11870;transport=tcp SIP/2.0
BYE			BYE sip:miyanhui_t1@172.30.11.79:11870;transport=tcp SIP/2.0
OPTIONS
PRACK
UPDATE
REFER
MESSAGE

2 SIP内容

项目	格式	含义	示例
Via			Via: SIP/2.0/TCP 172.30.2.35:5060;branch=z9hG4bKe0203a229263-30-2ea3ea\r\n
To			sip:miyanhui_t1@172.30.2.35;tag=AFCAF511D8F\r\n
From			sip:miyanhui_t3@172.30.2.35;tag=869388A8114\r\n
Call-ID			76ea44b5eb44080AE90--4080AE90-1-44b5eb4--4080AE90@172.30.11.89\r\n
CSeq			4 INVITE\r\n
Contact			sip:miyanhui_t1@172.30.11.79:11870;transport=tcp\r\n
Record-Route			sip:172.30.2.35:5060;transport=tcp;ftag=869388A8114;lr\r\n
User-Agent			"User-Agent: Vixtel APMVista Agent\r\n
Content-Length		指明SIP附加数据的长度	0\r\n

3 SIP附加数据

SIP/2.0 100 Trying
Via: SIP/2.0/TCP 172.30.11.76:6726;branch=z9hG4bK.B6X6CR18X;rport=6726
From: <sip:miyanhui_t2@172.30.2.35>;tag=YVwiGtgHV
To: sip:miyanhui_t1@172.30.2.35
Call-ID: 1YYJ-rBnlJ
CSeq: 20 INVITE
Server: Brekeke SIP Server rev.477 Evaluation
Content-Length: 0